package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper,Category> implements CategoryService{
    // 菜品
    @Autowired
    private DishService dishService;

    // 套餐
    @Autowired
    private SetmealService setmealService;

    /**
     * 删除分类信息
     * @param id
     */
    @Override
    public void remove(Long id) {
        /**
         * 判断当前分类下是否有菜品
         */
        LambdaQueryWrapper<Dish> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(Dish::getCategoryId,id);
        int count = dishService.count(wrapper);
        if (count>0){
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        /**
         * 判断当前分类下是否有套餐
         */
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Setmeal::getCategoryId,id);
        int count1 = setmealService.count(queryWrapper);
        if (count1>0){
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }

        // 直接删除
        removeById(id);
    }
}